Upstream information
Description
In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having moderate severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 4.6 |
| Vector | AV:L/AC:L/Au:N/C:P/I:P/A:P |
| Access Vector | Local |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
| National Vulnerability Database | |
|---|---|
| Base Score | 7.8 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Access Vector | Local |
| Access Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
| Product(s) | Source package | State |
|---|---|---|
| SUSE Linux Enterprise 15 Module for Basesystem | kernel-source | Not affected |
| SUSE Linux Enterprise 15 Module for Development Tools | kernel-source | Not affected |
| SUSE Linux Enterprise 15-SP1 Module for Basesystem | kernel-source | Not affected |
| SUSE Linux Enterprise 15-SP1 Module for Development Tools | kernel-source | Not affected |
| SUSE Linux Enterprise 15-SP2 Module for Basesystem | kernel-source | Not affected |
| SUSE Linux Enterprise 15-SP2 Module for Development Tools | kernel-source | Not affected |
| SUSE Linux Enterprise Desktop 12 SP4 | kernel-source | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | kernel-source | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP5 | kernel-source | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 11 SP1 | kernel-source | Not affected |
| SUSE Linux Enterprise Server 11 SP3 | kernel-source | Not affected |
| SUSE Linux Enterprise Server 11 SP4 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP1 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP2 | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP2 BCL | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP2 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP3 BCL | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP3 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP4 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server 12 SP5 | kernel-source | Not affected |
| SUSE Linux Enterprise Server 15 LTSS | kernel-source | Not affected |
| SUSE Linux Enterprise Server ESPOS 15 | kernel-source | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | kernel-source | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | kernel-source | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | kernel-source | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source | Not affected |
